/**
 * Copyright 2000 self.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 *
 * @author Ashin Wimalajeewa
 */
package self.amigo.editor.cmd;

import java.util.*;

import self.gee.*;
import self.gee.editor.*;

public class PropertiesChange implements ICommand {
  private IDiagramEditor    editor;
  private IEditableElement  source;
  private Map               changeTo = new HashMap();
  private Map               original = new HashMap();
  private List              inspectList;
  
  public PropertiesChange( IDiagramEditor ed, IEditableElement src, Map chgs ) {
    editor = ed;
    source = src;
    changeTo.putAll( chgs );
    source.getProperties( original );
    inspectList = Collections.singletonList( source );
  }
  
  public void executeIfRequired() {
    if ( PropertyUtils.isSame(original, changeTo) )
      return;
    editor.executeCommand( ICommand.ET_EXECUTE, this );
  }
  
  public void execute() {
    IDiagramLayer layer = editor.getSource().getContext();
    layer.beginUpdate();
    source.setProperties( changeTo );
    layer.endUpdate();
    editor.getSource().redraw();
    editor.inspectSelectedObjects( inspectList );
  }
  
  public void undo() {
    IDiagramLayer layer = editor.getSource().getContext();
    layer.beginUpdate();
    source.setProperties( original );
    layer.endUpdate();
    editor.getSource().redraw();
    editor.inspectSelectedObjects( inspectList );
  }
}